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| author | Adam Carpenter <53hornet@gmail.com> | 2019-03-27 15:32:37 -0400 |
|---|---|---|
| committer | Adam Carpenter <53hornet@gmail.com> | 2019-03-27 15:32:37 -0400 |
| commit | 67cdcc2e12118becb823e20a40cc2687f2b8425a (patch) | |
| tree | ed92c3234b89079e6d4cf36f5e80c5ffa79def48 /meap/meap-code/ch3/ch3-error-1.rs | |
| parent | e25482fca375d318a39c3b54db396b0db6e0b263 (diff) | |
| download | learning-rust-67cdcc2e12118becb823e20a40cc2687f2b8425a.tar.xz learning-rust-67cdcc2e12118becb823e20a40cc2687f2b8425a.zip | |
Started Rust in Action MEAP.
Diffstat (limited to 'meap/meap-code/ch3/ch3-error-1.rs')
| -rw-r--r-- | meap/meap-code/ch3/ch3-error-1.rs | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/meap/meap-code/ch3/ch3-error-1.rs b/meap/meap-code/ch3/ch3-error-1.rs new file mode 100644 index 0000000..bdf9088 --- /dev/null +++ b/meap/meap-code/ch3/ch3-error-1.rs @@ -0,0 +1,30 @@ +extern crate rand; // <> Make an external crate available to our code
+use rand; // <> Bring `rand` into local scope
+
+static mut ERROR: isize = 0;
+
+struct File;
+
+#[allow(unused_variables)]
+fn read(f: &File, save_to: Vec<u8>) -> usize {
+ if rand::thread_rng().gen_weighted_bool(10000) {
+ unsafe {
+ ERROR = 1;
+ }
+ }
+
+ 0 // <> Always read() 0 bytes
+}
+
+#[allow(unused_mut)]
+fn main() {
+ let mut f = File;
+ let mut buffer = vec![];
+
+ read(&f, buffer);
+ unsafe {
+ if ERROR != 0 {
+ panic!("An error has occurred!")
+ }
+ }
+}
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